Figure 2

The feasible utility region$\mathcal{F}$. Case (I): the channel gains are given by h₁₁ = 0.73, h₁₂ = 0.04, h₂₁ = 0.03, and h₂₂ = 0.89, and the maximum power are$P_1^{\text{max}}=20$,$P_2^{\text{max}}=100$; Case (II): the channel gains are given by h₁₁ = 0.30, h₁₂ = 0.50, h₂₁ = 0.03, and h₂₂ = 0.80, and the maximum power are$P_1^{\text{max}}=1$,$P_2^{\text{max}}=2$. In both cases, the noise power is 0.1 for each link, and the weights are w₁ = 0.57, w₂ = 0.43.